405555541 has 2 divisors, whose sum is σ = 405555542. Its totient is φ = 405555540.

The previous prime is 405555533. The next prime is 405555569. The reversal of 405555541 is 145555504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 358344900 + 47210641 = 18930^2 + 6871^2 .

It is a cyclic number.

It is not a de Polignac number, because 405555541 - 2³ = 405555533 is a prime.

It is a super-3 number, since 3×405555541³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405555497 and 405555506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405535541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202777770 + 202777771.

It is an arithmetic number, because the mean of its divisors is an integer number (202777771).

Almost surely, 2^405555541 is an apocalyptic number.

It is an amenable number.

405555541 is a deficient number, since it is larger than the sum of its proper divisors (1).

405555541 is an equidigital number, since it uses as much as digits as its factorization.

405555541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 405555541 is about 20138.4095946030. The cubic root of 405555541 is about 740.2017595705.

The spelling of 405555541 in words is "four hundred five million, five hundred fifty-five thousand, five hundred forty-one".